Proper Pruning Practices Flashcards
6 cards from real ISA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Proper Pruning Practices flashcards as text
What distinguishes a 'heading cut' from a 'thinning cut' in pruning terminology?
Answer: A heading cut removes a branch back to a bud or smaller lateral, while a thinning cut removes a branch at its point of origin
A heading cut shortens a branch by cutting back to a bud or small lateral (less than one-third the diameter), typically stimulating dense regrowth. A thinning cut removes a branch entirely at its point of attachment.
What is the ANSI A300 standard's definition of 'topping' a tree?
Answer: The reduction of a tree's size using heading cuts that shorten branches to stubs or to laterals not large enough to assume the terminal role
ANSI A300 defines topping as reducing tree size through heading cuts to stubs or inadequate laterals. It is considered harmful and is not an acceptable pruning practice in professional arboriculture.
When pruning for utility line clearance, what technique is preferred to maintain tree health while achieving clearance?
Answer: Directional pruning using reduction and removal cuts to redirect growth away from utility lines
Directional pruning uses reduction and removal cuts to redirect the tree's growth away from utility lines while maintaining natural form and tree health.
What is 'included bark' at a branch union and why is it a concern for pruning decisions?
Answer: Bark that is trapped between codominant stems or branches, indicating a structurally weak attachment
Included bark occurs when bark becomes trapped between two stems or a branch and trunk growing tightly together, preventing the formation of strong connective wood and creating a structurally weak union prone to failure.
Why should wound dressings or pruning sealants generally NOT be applied to pruning cuts?
Answer: Research shows they do not prevent decay, can trap moisture, and may inhibit the tree's natural wound closure process
Extensive research has shown that wound dressings do not prevent decay or speed healing. They can actually trap moisture, create favorable conditions for fungal growth, and interfere with the tree's natural compartmentalization response.
What is 'subordination pruning' and when is it used?
Answer: Reducing the length and end weight of a competing or codominant stem to slow its growth and allow the preferred stem to become dominant
Subordination pruning reduces a competing codominant stem to slow its growth rate relative to the preferred leader, encouraging a stronger single-leader structure over time.